I bought a Sylvania OSRAM Lightify RGBW as I wanted to play around with a colored bulb. I have several other OSRAM Bulbs, but they are dimmable white only and have been happy with them.

So, I added the bulb using the zigbee aprontest command as I usually do. However, checking the attributes, I don't see anything for color (hue, saturation, red, green, blue) which I would expect to see. Well, supposedly as these are what controls the colors. I say supposedly as this is the first colored bulb I have added.